SpringBoot 2.0参数校验Hibernate Validator

<dependency>
   <groupId>org.hibernate</groupId>
   <artifactId>hibernate-validator</artifactId>
   <version>6.0.13.Final</version>
</dependency>

package com.futao.springmvcdemo.utils;

import org.hibernate.validator.HibernateValidator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.validation.beanvalidation.MethodValidationPostProcessor;

import javax.validation.Validation;
import javax.validation.Validator;

/**
 * @author futao
 * Created on 2018/9/23-20:00.
 * Hibernate Validator配置类
 */
@Configuration
public class HibernateValidatorConfiguration {

    /**
     * JSR和Hibernate validator的校验只能对Object的属性进行校验
     * 不能对单个的参数进行校验
     * spring 在此基础上进行了扩展
     * 添加了MethodValidationPostProcessor拦截器
     * 可以实现对方法参数的校验
     *
     * @return
     */
    @Bean
    public MethodValidationPostProcessor methodValidationPostProcessor() {
        MethodValidationPostProcessor processor = new MethodValidationPostProcessor();
        processor.setValidator(validator());
        return processor;
    }

    @Bean
    public static Validator validator() {
        return Validation
                .byProvider(HibernateValidator.class)
                .configure()
                //快速返回模式，有一个验证失败立即返回错误信息
                .failFast(true)
                .buildValidatorFactory()
                .getValidator();
    }
//
//    public static <T> void validate(T obj) {
//        Set<ConstraintViolation<T>> constraintViolations = validator().validate(obj);
//        if (constraintViolations.size() > 0) {
//            throw LogicException.le(constraintViolations.iterator().next().getMessage());
//        }
//    }
}

package com.futao.springmvcdemo.model.entity.constvar;

/**
 * @author futao
 * Created on 2018/9/21-15:29.
 * 错误提示集合类
 * 错误码构成：   01程序员编号
 * 001该程序员定义的错误码
 * 后面再跟上错误信息
 */
public final class ErrorMessage {
    public static final String SYSTEM_EXCEPTION = "系统繁忙，请稍后再试";
    public static final String NOT_LOGIN = "01001_您还未登陆或者登陆已超时，请重新登陆";
    public static final String MOBILE_ALREADY_REGISTER = "01002_该手机号已经被注册了";
    public static final String LOGIC_EXCEPTION = "01003_对不起，你是真的没有我帅";
    public static final String MOBILE_LEN_ILLEGAL = "01004_手机号长度不合法";
    public static final String EMAIL_ILLEGAL = "01005_邮箱格式不合法";
    public static final String USERNAME_LEN_ILLEGAL = "01006_名字长度不合法";
}

package com.futao.springmvcdemo.foundation;

import com.alibaba.fastjson.JSONObject;
import com.futao.springmvcdemo.model.entity.constvar.ErrorMessage;
import com.futao.springmvcdemo.model.system.RestResult;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.validation.ConstraintViolationException;

/**
 * @author futao
 * Created on 2018/9/21-15:13.
 * 异常统一处理，
 */
@ControllerAdvice
public class GlobalExceptionHandler {

    private static final Logger logger = LoggerFactory.getLogger(GlobalExceptionHandler.class);

    @ExceptionHandler(value = Exception.class)
    @ResponseBody
    public Object logicExceptionHandler(HttpServletRequest request, Exception e, HttpServletResponse response) {
        //系统级异常，错误码固定为-1，提示语固定为系统繁忙，请稍后再试
        RestResult result = new RestResult(false, "-1", e.getMessage(), ErrorMessage.SYSTEM_EXCEPTION);
        //如果是业务逻辑异常，返回具体的错误码与提示信息
        if (e instanceof LogicException) {
            LogicException logicException = (LogicException) e;
            result.setCode(logicException.getCode());
            result.setErrorMessage(logicException.getErrorMsg());
            //Validator验证框架抛出的业务逻辑异常
        } else if (e instanceof ConstraintViolationException) {
            String message = ((ConstraintViolationException) e).getConstraintViolations().iterator().next().getMessage();
            result.setCode(message.substring(0, 5));
            result.setErrorMessage(message.substring(6));
        } else {
            //对系统级异常进行日志记录
            logger.error("系统异常:" + e.getMessage(), e);
        }
        return JSONObject.toJSON(result);
    }
}

/**
 * @author futao
 * Created on 2018/9/19-15:05.
 */
@RequestMapping(path = "User", produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
@RestController
@Validated
public class UserController {

    @Resource
    private UserService userService;

/**
     * 用户注册
     *
     * @param username 用户名
     * @param age      年龄
     * @param mobile   手机号
     * @param email    邮箱
     * @param address  地址
     * @return
     */
    @PostMapping("register")
    public JSONObject register(
            /*使用@RequestBody注解需要保证该对象有默认的空的构造函数
             * 是流的形式读取，那么流读了一次就没有了
             * */
            @RequestParam("username")
            @Size(min = 3, max = 8, message = ErrorMessage.USERNAME_LEN_ILLEGAL)
                    String username,
            @RequestParam("age")
                    String age,
            @Size(max = 11, message = ErrorMessage.MOBILE_LEN_ILLEGAL)
            @RequestParam("mobile")
                    String mobile,
            @RequestParam("email")
            @Email(message = ErrorMessage.EMAIL_ILLEGAL)
                    String email,
            @NotBlank
            @RequestParam("address")
                    String address
    ) {
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("result", "注册失败");
        if (userService.register(username, age, mobile, email, address)) {
            jsonObject.put("result", "注册成功");
        }
        return jsonObject;
    }
}